沒有一百分的另一半 只有五十分的兩個人

沒有一百分的另一半　只有五十分的兩個人 " ....你有什么看法?? --Jobby..

been thinking on this few minutes, i still can't figure how is it work..
is it mean 100% = 2 person? single party is alwis have only 50%?
we alwis says it's take 2 hand to claps..